CN112254921B - High-speed wind tunnel three-degree-of-freedom model supporting mechanism - Google Patents

Abstract

The invention relates to a high-speed wind tunnel three-degree-of-freedom model supporting mechanism, and belongs to the field of aero-pneumatic wind tunnel support tests. The device comprises a base, a supporting upright post, a yawing platform, a first driving device, a first locking device, a pitching platform, a second driving device, a second locking device, a model mounting platform, a third driving device and a third locking device, wherein the supporting upright post is connected with the base and the yawing platform, the first driving device is connected with the supporting upright post and is used for driving the supporting upright post to do yawing motion, the second driving device is connected with the pitching platform and is used for driving the pitching platform to do, the model mounting platform is connected with the model, the third driving device is used for driving the model mounting platform to move axially, the first locking device is used for locking or releasing the yawing platform, the second locking device is used for locking or releasing the pitching platform, and the third locking device is used for locking or releasing the model mounting platform. The three-degree-of-freedom motion is realized, two working modes of fixing and posture changing are provided, and the aircraft model can move in a centering mode.

Description

High-speed wind tunnel three-degree-of-freedom model supporting mechanism

Technical Field

The invention relates to the technical field of an aero-pneumatic wind tunnel support test, in particular to a high-speed wind tunnel three-degree-of-freedom model support mechanism.

Background

In a high-speed wind tunnel, in order to simulate the influence of a high-speed aircraft on the high-speed aircraft in a complex flow field, the three-degree-of-freedom model supporting mechanism not only needs to support a test section model, but also needs to adjust the pose of the test section model. At present, the three-degree-of-freedom change realized by most three-degree-of-freedom mechanisms is angle change in the attack angle direction, position change in the vertical direction and position change in the horizontal direction.

In the design of a certain wind tunnel, three degrees of freedom change realized by the three-degree-of-freedom model supporting mechanism is pitch angle change, yaw angle change and axial position change. The test model realizes pose adjustment, positioning and locking through the three-degree-of-freedom supporting mechanism. The three-degree-of-freedom model test requires that the mechanism has two working modes of fixed posture and variable posture, and when the fixed posture works, the mechanism is locked for testing; when the attitude is changed, the mechanism has a three-axis linkage function, the mechanism continuously moves according to set parameters, and the rotation centers of pitching and yawing in the test process are kept unchanged.

The existing three-degree-of-freedom mechanism is inconvenient in pitch angle change, yaw angle change and axial position change, and meanwhile, the existing three-degree-of-freedom mechanism can only realize one working mode, namely a fixed-attitude working mode or a variable-attitude working mode, and cannot meet the requirement that one mechanism can realize two working modes.

Disclosure of Invention

Aiming at the defects in the prior art, the invention provides the high-speed wind tunnel three-degree-of-freedom model supporting mechanism which can well realize three-degree-of-freedom (pitching, yawing and axial movement) movement, has two working modes of fixed posture and changed posture, is convenient to adjust and good in test stability, can simultaneously enable the aircraft model to do centering movement, and can enable the aircraft model to do centering movement around an appointed rotation center no matter how the size of the mechanism, the position of the aircraft model, the installation mode and the like are changed.

In order to achieve the above purpose, the solution adopted by the invention is as follows:

a high-speed wind tunnel three-degree-of-freedom model supporting mechanism comprises a base, a supporting upright post, a yaw rotating shaft, a first driving device, a yaw guide rail group, a yaw platform, a first locking device, a front pitch guide rail mounting table, a back pitch guide rail mounting table, a pitch platform, a pitch guide rail group, a second driving device, a second locking device, a model mounting platform, a third driving device and a third locking device, wherein the supporting upright post is connected with the base, one end surface of the supporting upright post, far away from the base, comprises a first side edge and a second side edge which are oppositely arranged, a third side edge and a fourth side edge which are oppositely arranged, one end of the yaw rotating shaft is connected with the center of the first side edge, the other end of the yaw rotating shaft is rotatably connected with the yaw platform, the yaw guide rail group is arranged on the second side edge, the third side edge and the fourth side edge, the yaw platform is slidably connected with the yaw guide rail group, the first locking device is arranged on the second side edge and used for locking or releasing the yawing platform, pitching guide rail groups are arranged on two opposite side surfaces of the pitching platform, a front pitching guide rail mounting table and a rear pitching guide rail mounting table are arranged on the two opposite side surfaces of the pitching platform, the pitching guide rail groups are connected with one end of the front pitching guide rail mounting table and one end of the rear pitching guide rail mounting table in a sliding manner, the other end of the front pitching guide rail mounting table and the other end of the rear pitching guide rail mounting table are connected with the yawing platform, the second driving device is connected with the front pitching guide rail mounting table and used for driving the pitching platform to do pitching motion, the second locking device is arranged on the rear pitching guide rail mounting table and used for locking or releasing the pitching platform, a linear guide rail is arranged on one end surface of the pitching platform, which is far away from the yawing platform, one end of the model mounting table is, the third driving device is installed in the groove and used for driving the model installation platform to move axially, and the third locking device is installed on the pitching platform and used for locking or releasing the model installation platform.

Further, in a preferred embodiment of the present invention, the yaw guide rail set includes two first yaw guide rails, two second yaw guide rails and two third yaw guide rails, the two first yaw guide rails are symmetrically disposed on the third side and the fourth side, respectively, the second yaw guide rail is mounted on the fourth side, and the two third yaw guide rails are symmetrically disposed on the third side and the fourth side, respectively, and are located between the first yaw guide rails and the second yaw guide rails.

Further, in a preferred embodiment of the present invention, the first driving device includes a yaw hydraulic mounting base, a yaw hydraulic cylinder, and a hinge shaft, one end of the yaw hydraulic mounting base is connected to the second side edge, the other end of the yaw hydraulic mounting base is connected to the yaw hydraulic cylinder, one end of the hinge shaft is connected to the telescopic end of the yaw hydraulic cylinder, and the other end of the hinge shaft is connected to the yaw platform.

Further, in a preferred embodiment of the present invention, the first locking device includes a yaw locking hydraulic cylinder and a first pin, the yaw locking hydraulic cylinder is mounted on the second side edge, the yaw locking hydraulic cylinder is connected to the first pin and is configured to drive the first pin to move toward or away from the yaw platform, the yaw platform is provided with a plurality of yaw platform positioning holes matching with the first pin, a line connecting centers of the plurality of yaw platform positioning holes is a first arc segment, and an included angle formed by a line connecting centers of every two adjacent yaw platform positioning holes and a center of the first arc segment is 1 °.

Further, in a preferred embodiment of the present invention, the pitch guide rail set includes a first pitch guide rail, a second pitch guide rail, and a third pitch guide rail, the first pitch guide rail and the second pitch guide rail are both slidably connected to the front pitch guide rail mounting platform, and the third pitch guide rail is slidably connected to the back pitch guide rail mounting platform.

Further, in a preferred embodiment of the present invention, the second driving device includes two pitching hydraulic mounting seats, two pitching hydraulic cylinders and two hydraulic cylinder hinge shafts, the two pitching hydraulic mounting seats are respectively connected to the two front pitching rail mounting tables, one ends of the two pitching hydraulic mounting seats, which are far away from the front pitching rail mounting tables, are connected to the pitching hydraulic cylinders, one ends of the hydraulic cylinder hinge shafts are connected to the telescopic ends of the pitching hydraulic cylinders, and the other ends of the hydraulic cylinder hinge shafts are connected to the pitching platform.

Further, in a preferred embodiment of the present invention, the second locking device includes a pitching locking hydraulic cylinder and a second pin, the pitching locking hydraulic cylinder is mounted on the back pitching guide rail mounting table, the pitching locking hydraulic cylinder is connected to the second pin and is configured to drive the second pin to move toward or away from the pitching platform, the pitching platform is provided with a plurality of pitching platform positioning holes matching with the second pin, a line connecting centers of the plurality of pitching platform positioning holes is a second arc segment, and an included angle formed by a line connecting centers of every two adjacent pitching platform positioning holes and a center of the second arc segment is 1 °.

Further, in a preferred embodiment of the present invention, the third driving device includes an axial hydraulic cylinder mounting seat, an axial hydraulic cylinder, and a connecting seat, one end of the axial hydraulic cylinder mounting seat is connected to the bottom wall of the groove, the other end of the axial hydraulic cylinder mounting seat is connected to the axial hydraulic cylinder, one end of the connecting seat is connected to the telescopic end of the axial hydraulic cylinder, and the other end of the connecting seat is connected to the model mounting platform.

Further, in a preferred embodiment of the present invention, the third locking device includes two locking mounting platforms, two axial locking hydraulic cylinders and a third bolt, the two locking mounting platforms are respectively mounted at one end of each of the two side surfaces of the pitching platform, which is close to the model mounting platform, each of the locking mounting platforms is provided with an axial locking hydraulic cylinder, each of the axial locking hydraulic cylinders is connected with the third bolt and is used for driving the third bolt to move toward a direction close to or away from the model mounting platform, and the two side surfaces of the model mounting platform are provided with a plurality of axial platform positioning holes at intervals, which are matched with the third bolt.

The high-speed wind tunnel three-degree-of-freedom model supporting mechanism provided by the invention has the beneficial effects that: the first driving device drives the yawing platform to do yawing rotary motion around a yawing rotary shaft, the yawing platform drives the pitching platform to do yawing rotary motion during yawing rotary motion, so as to drive the model to do yawing rotary motion, the supporting upright posts provide supporting force for the whole mechanism, the bearing capacity of the mechanism can be improved and the stability of the model during yawing rotary motion can be improved through the yawing guide rail set, the second driving device drives the pitching platform to do pitching motion, the pitching platform drives the model mounting platform to do pitching motion while doing pitching motion, so as to drive the model to do pitching motion, the pitching platform is supported through the front pitching guide rail mounting platform and the rear pitching guide rail mounting platform, so that the supporting force of the pitching platform is improved, the balance degree and the stability during pitching platform motion can be improved, and the third driving device drives the model mounting platform to do axial motion, the model mounting platform moves axially to drive the model to move axially, so that three-degree-of-freedom (pitching, yawing and axial movement) motion can be well realized; when the attitude is fixed, the yaw platform, the pitch platform and the model installation platform are respectively locked through the first locking device, the second locking device and the third locking device according to the preset model position (pitch angle, yaw angle and axial position), and then a test is carried out; the yaw platform, the pitching platform and the model installation platform are respectively released through the first locking device, the second locking device and the third locking device, the motion parameters of the mechanism are set, the mechanism continuously moves according to the set parameters in the test, the axial direction is kept motionless, the pitching yawing rotation center is kept unchanged, namely, the centering motion of the aircraft model can be realized, the aircraft model rotates around a yawing rotation shaft as the rotation center, and meanwhile, the centering motion of the aircraft model can be realized around the appointed rotation center no matter what the size of the mechanism, the position of the aircraft model, the installation mode and the like are changed.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic structural diagram of a high-speed wind tunnel three-degree-of-freedom model support mechanism according to an embodiment of the present invention;

FIG. 2 is a top view of a support column and a first drive assembly provided in accordance with an embodiment of the present invention;

FIG. 3 is a top view of a yaw deck provided by an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a pitching platform provided in an embodiment of the present invention;

fig. 5 is a schematic structural diagram of an installation relationship between a pitch rail set and a pitch platform according to an embodiment of the present invention.

Icon: 100-high speed wind tunnel three-degree-of-freedom model supporting mechanism; 200-a base; 300-supporting upright posts; 310-a first side edge; 320-a second side edge; 330-third side; 340-fourth side; 350-a first upright post; 360-a second column; 370-a third column; 410-yaw rotation axis; 420-a first drive; 421-yaw hydraulic mount; 422-yaw hydraulic cylinder; 423-articulated shaft; 430-yaw guide rail set; 431-a first yaw guide; 432-a second yaw guide; 433-a third yaw guide rail; 434-a first stopper; 435-a first limit switch; 440-a yaw platform; 441-a first slider; 450-a first locking device; 451-yaw locking hydraulic cylinder; 453-yaw platform locating hole; 510-a front pitch rail mount; 520-back pitch rail mount; 530-pitching platform; 531-linear guide; 532-groove; 533-a third stopper; 534-third limit switch; 535-zero position switch; 540-pitch rail set; 541-a first pitch rail; 542-a second pitch rail; 543-a third pitch rail; 544-a second stopper; 545-a second limit switch; 550-a second drive; 551-pitch hydraulic mount; 552-pitch cylinder; 553-hydraulic cylinder articulated shaft; 560-a second locking device; 561-pitch locking hydraulic cylinder; 563-pitch platform location holes; 570-a second slider; 600-a model; 610-model mounting platform; 620-third drive means; 621-axial hydraulic cylinder mounting seat; 622-axial hydraulic cylinder; 623-a connecting seat; 630-a third locking device; 631-a locking mount; 632-an axial locking hydraulic cylinder; 634-axial stage locating hole; 640-third slider.

Detailed Description

To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inside", "outside", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships conventionally put in use of products of the present invention, and are only for convenience of description and simplification of description, but do not indicate or imply that the devices or elements referred to must have specific orientations, be constructed in specific orientations, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical" and the like do not imply that the components are required to be absolutely horizontal or pendant, but rather may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "connected," and "connected" are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Examples

Referring to fig. 1, the present embodiment provides a high-speed wind tunnel three-degree-of-freedom model supporting mechanism 100, which includes a base 200, a supporting upright 300, a yaw rotation axis 410, a first driving device 420, a yaw guide rail set 430, a yaw platform 440, a first locking device 450, a front pitch guide rail mounting table 510, a back pitch guide rail mounting table 520, a pitch platform 530, a pitch guide rail set 540, a second driving device 550, a second locking device 560, a model 600, a model mounting table 610, a third driving device 620, and a third locking device 630.

Referring to fig. 1 and 2, the support columns 300 are connected to the base 200, so as to provide a supporting force for the entire mechanism through the support columns 300, an end surface of the support columns 300 away from the base 200 includes a first side 310 and a second side 320, which are oppositely disposed, and a third side 330 and a fourth side 340, which are oppositely disposed, one end of the yaw rotation axis 410 is connected to the center of the first side 310, the other end of the yaw rotation axis is rotatably connected to the yaw platform 440, the first driving device 420 is connected to the second side 320 and is configured to drive the yaw platform 440 to perform yaw rotation around the yaw rotation axis 410, so as to enable the yaw platform 440 to perform yaw rotation around the yaw rotation axis 410 through the first driving device 420.

Further, first drive arrangement 420 includes driftage hydraulic pressure mount pad 421, driftage pneumatic cylinder 422 and articulated shaft 423, the one end and the second side 320 of driftage hydraulic pressure mount pad 421 are connected, the other end is connected with driftage pneumatic cylinder 422, the one end of articulated shaft 423 is connected with driftage pneumatic cylinder 422's flexible end, the other end is connected with driftage platform 440, the motion of the flexible end through driftage pneumatic cylinder 422 drives the motion of articulated shaft 423, and then drive driftage platform 440 to be driftage rotary motion around driftage rotation axis 410 through the motion of articulated shaft 423.

Yaw guide rail set 430 is installed on second side 320, third side 330 and fourth side 340, and yaw platform 440 and yaw guide rail set 430 sliding connection not only can improve the bearing capacity of mechanism through yaw guide rail set 430, can also improve the stability of mechanism when yaw rotary motion. In the present invention, the yaw deck 440 is slidably connected to the yaw rail assembly 430 by the first slider 441.

Further, the yaw guide group 430 includes two first yaw guides 431, two second yaw guides 432 and three third yaw guides 433, where the two first yaw guides 431 are respectively symmetrically disposed on the third side 330 and the fourth side 340, the second yaw guide 432 is mounted on the fourth side 340, the two third yaw guides 433 are respectively symmetrically disposed on the third side 330 and the fourth side 340, and are located between the first yaw guides 431 and the second yaw guides 432, it should be noted that specific mounting angles of the first yaw guides 431, the second yaw guides 432 and the third yaw guides 433, and circular arc angles of the first yaw guides 431, the second yaw guides 432 and the third yaw guides 433, etc. may be set according to actual needs and designs.

Referring to fig. 2, in order to prevent the yaw platform 440 from exceeding the size range of the guide rails during the movement, a first limit block 434 and a first limit switch 435 are installed at two sides of the second yaw guide rail 432, when the first slider 441 touches the first limit switch 435 during the movement, the yaw platform 440 stops moving, the first slider 441 continues to move due to inertia, and the first limit block 434 blocks the first slider 441 from continuing to move.

A first locking device 450 is mounted to the second lateral side 320 for locking or unlocking the yaw deck 440. The purpose is to lock the yawing platform 440 by the first locking device 450 when the mechanism is in fixed-attitude operation, and release the yawing platform 440 by the first locking device 450 when the mechanism is in variable-attitude operation.

With reference to fig. 2 and 5, further, the first locking device 450 includes a yaw locking hydraulic cylinder 451 and a first bolt (not shown), the yaw locking hydraulic cylinder 451 is installed on the second side 320, the yaw locking hydraulic cylinder 451 is connected to the first bolt 452 and is used for driving the first bolt to move toward a direction close to or away from the yaw platform 440, the yaw platform 440 is provided with a plurality of yaw platform positioning holes 453 matched with the first bolt, when the yaw platform 440 needs to be locked, the first bolt is pushed into the yaw platform positioning holes 453 by the yaw locking hydraulic cylinder 451 to lock the yaw platform 440, when the yaw platform 440 needs to be released, the first bolt is taken out of the yaw platform positioning holes 453 by the yaw locking hydraulic cylinder 451 to release the yaw platform 440, which is convenient and fast.

The connecting line of the centers of the plurality of yaw platform positioning holes 453 is a first circular arc segment, and an included angle formed by the connecting line of the centers of every two adjacent yaw platform positioning holes 453 and the center of the first circular arc segment is 1 °, that is, the first locking device 450 can realize that locking can be realized when the yaw platform 440 moves by 1 °, so as to improve the locking precision, that is, high-precision locking can be realized.

With reference to fig. 1 and fig. 2, further, in the present invention, the supporting upright 300 includes a first upright 350, two second uprights 360 and a third upright 370, the two second uprights 360 are symmetrically disposed at two ends of the first upright 350 and located at the same side of the first upright 350, one ends of the two second uprights 360 far away from the first upright 350 are respectively connected with two ends of the third upright 370, wherein the first side 310 is located at one end of the first upright 350 far away from the base 200, the third side 330 and the fourth side 340 are respectively located at one ends of the two second uprights 360 far away from the base 200, and the second side plate 320 is located at one end of the third upright 370 far away from the base 200.

Referring to fig. 4 and 5, the pitch rail set 540 is installed on both opposite sides of the pitch platform 530, and both the pitch rail set 510 and the back pitch rail mount 520 are installed on both opposite sides of the pitch platform, and the pitch rail set 540 is slidably connected to one end of the front pitch rail mount 510 and one end of the back pitch rail mount 520, in the present invention, the pitch rail set 540 is slidably connected to one end of the front pitch rail mount 510 and one end of the back pitch rail mount 520 through the second slider 570, that is, the pitch rail set 540 slides relative to the front pitch rail mount 510 and the back pitch rail mount 520. The other end of front pitch rail mount 510 and the other end of back pitch rail mount 520 are both connected to yaw deck 440 for the purpose of supporting pitch deck 530.

Further, the pitch rail set 540 includes a first pitch rail 541, a second pitch rail 542, and a third pitch rail 543, where the first pitch rail 541 and the second pitch rail 542 are slidably connected to the front pitch rail mount 510, and the third pitch rail 543 is slidably connected to the back pitch rail mount 520.

It should be noted that the installation positions of the first pitch rail 541, the second pitch rail 542, and the third pitch rail 543 are determined according to the size of the pitch platform 530, and one end of the rails is installed at the edge of the pitch platform 530.

Referring to fig. 4 and 5, the second driving device 550 is connected to the front pitch rail mounting platform 510 and is used for driving the pitch platform 530 to perform a pitch motion, and when the pitch platform 530 performs a pitch motion, the pitch rail set 540 is driven to slide relative to the front pitch rail mounting platform 510 and the back pitch rail mounting platform 520.

Further, the second driving device 550 includes two pitch hydraulic mounting seats 551, two pitch hydraulic mounting seats 552 and two hydraulic cylinder hinge shafts 553, the two pitch hydraulic mounting seats 551 are respectively connected to the two front pitch rail mounting platforms 510, that is, each front pitch rail mounting platform 510 is connected to the pitch hydraulic mounting seat 551, one ends of the two pitch hydraulic mounting seats 551 far away from the front pitch rail mounting platforms 510 are connected to the pitch hydraulic cylinders 552, one ends of the hinge shafts of the hydraulic cylinders 553 are connected to the telescopic ends of the pitch hydraulic cylinders 552, and the other ends of the hinge shafts of the hydraulic cylinders 553 are connected to the pitch platform 530.

In order to prevent the pitch platform 530 from exceeding the size range of the guide rails during the movement process, a second limit block 544 and a second limit switch 545 are installed at the upper end of the second pitch guide rail 542 and the lower end of the third pitch guide rail 543, when the second slider 570 touches the second limit switch 545 during the movement process, the pitch platform 530 stops moving, the second slider 570 continues to move due to inertia, and the second limit block 544 blocks the second slider 570 from continuing to move.

The second locking means 560 is installed to the back pitch rail installation stage 520 and serves to lock or release the pitch platform 530 in order to lock the pitch platform 530 by the second locking means 560 when the mechanism is operated in a fixed attitude, and to release the pitch platform 530 by the second locking means 560 when the mechanism is operated in a variable attitude.

Further, the second locking device 560 includes a pitch locking hydraulic cylinder 561 and a second pin (not shown), the pitch locking hydraulic cylinder 561 is installed on the back pitch rail installation table 520, the pitch locking hydraulic cylinder 561 is connected to the second pin and is used to drive the second pin to move toward a direction close to or away from the pitch platform 530, and the pitch platform 530 is provided with a plurality of pitch platform positioning holes 563 matching with the second pin. When the pitching platform 530 needs to be locked, the second bolt is pushed into the pitching platform positioning hole 563 through the pitching locking hydraulic cylinder 561 to lock the pitching platform 530, and when the pitching platform 530 needs to be released, the second bolt is taken out of the pitching platform positioning hole 563 through the pitching locking hydraulic cylinder 561 to release the pitching platform 530, so that the convenience and the rapidness are achieved.

The connecting line of the centers of the plurality of pitching platform positioning holes 563 is a second arc segment, an included angle formed by the centers of every two adjacent pitching platform positioning holes 563 and the connecting line of the centers of the second arc segments is 1 °, and the second locking device 560 can lock the pitching platform 530 after moving for 1 °, so that the locking precision is improved, that is, high-precision locking can be realized. Further, the front pitch rail mount 510 is also mounted with a second locking mechanism 560 for the purpose of improving the stability of the locked pitch platform 530. It should be noted that, in the present invention, two second locking devices 560 are respectively installed on the front pitch guide mounting table 510 and the back pitch guide mounting table 520, in order to further improve the stability of the locking pitch platform 530, each second locking device 560 corresponds to one group of pitch platform positioning holes 563, the pitch platform positioning holes 563 corresponding to the second locking device 560 on the front pitch guide mounting table 510 are respectively installed on two sides of the third pitch guide 543, the interval angle between the two groups of pitch platform positioning holes 563 is 2 °, the pitch platform positioning holes 563 corresponding to the second locking device 560 on the back pitch guide mounting table 520 are respectively installed on two sides of the second pitch guide 542, and the interval angle between the two groups of pitch platform positioning holes 563 is 2 °.

With reference to fig. 1 and 5, a linear guide 531 is installed on one end surface of the pitching platform 530 far away from the yawing platform 440, one end of the model installation platform 610 is connected to the model 600, and the other end is slidably installed on the linear guide 531, in the present invention, 2 linear guide 531 are symmetrically arranged on one end surface of the pitching platform 530 far away from the yawing platform 440, wherein the model installation platform 610 is slidably connected to the linear guide 531 through a third slider 640, a groove 532 is axially formed on one end surface of the pitching platform 530 far away from the yawing platform 440, and a third driving device 620 is installed on the groove 532 and used for driving the model installation platform 610 to axially move.

Further, third drive arrangement 620 includes axial hydraulic cylinder mount pad 621, axial hydraulic cylinder 622 and connecting seat 623, the one end of axial hydraulic cylinder mount pad 621 is connected with the diapire of recess 532, the other end is connected with axial hydraulic cylinder 622, the one end of connecting seat 623 is connected with the flexible end of axial hydraulic cylinder 622, the other end and the model mounting platform 610 of connecting seat 623 are connected, the flexible end of axial hydraulic cylinder 622 drives connecting seat 623 and is axial motion, axial motion is made to connecting seat 623 and drives model mounting platform 610 and be axial motion, and then drive model 600 and be axial motion.

The third locking device 630 is installed to the pitch platform 530 and serves to lock or release the model installation platform 610. The purpose is to lock the model mounting platform 610 by the third locking device 630 when the mechanism works in a fixed posture, and to release the model mounting platform 610 by the third locking device 630 when the mechanism works in a variable posture.

In order to prevent the model mounting platform 610 from exceeding the size range of the guide rail in the movement process, the third limiting blocks 533 are mounted at two ends of the linear guide rail 531, one end of the linear guide rail 531 is mounted with the third limiting switch 534, and the other end of the linear guide rail 531 is mounted with the zero-position switch 535, when the third slider 640 touches the third limiting switch 534 in the movement process, the pitching platform 530 stops moving, the third slider 640 continues to move due to inertia, and the third limiting blocks 533 block the third slider 640 from continuing to move; when the axial movement mechanism is in the initial position, touching the null switch 535, the system will indicate that the model 600 is in the initial position.

Further, the third locking device 630 includes two locking installation platforms 631, two axial locking hydraulic cylinders 632 and a third bolt (not shown), the two locking installation platforms 631 are respectively installed at one end of two side surfaces of the pitching platform 530 close to the model installation platform 610, each locking installation platform 631 is provided with an axial locking hydraulic cylinder 632, each axial locking hydraulic cylinder 632 is connected with the third bolt and is used for driving the third bolt to move towards a direction close to or far away from the model installation platform 610, and two side surfaces of the model installation platform 610 are provided with a plurality of axial platform positioning holes 634 at intervals, which are matched with the third bolt. When the model mounting platform 610 needs to be locked, the third bolt is pushed into the axial platform positioning hole 634 through the axial locking hydraulic cylinder 632 to lock the model mounting platform 610, and when the model mounting platform 610 needs to be released, the third bolt is taken out of the axial platform positioning hole 634 through the axial locking hydraulic cylinder 632 to release the model mounting platform 610, so that the locking is convenient and fast.

Further, the distance between the centers of every two adjacent axial platform positioning holes 634 is variable and can be set according to actual needs, and the distance between the centers of every two adjacent axial platform positioning holes 634 is set to improve the locking precision, that is, to achieve high-precision locking.

It should be noted that, in the present invention, the number of the first slider 441, the second slider 570 and the third slider 640 is plural, and the specific number can be set as required.

It should be noted that the first latch of the first locking device 450, the second latch of the second locking device 560, and the third latch of the third locking device 630 may be locked not only automatically by a hydraulic system, but also manually.

The first driving device 420 drives the yawing platform 440 to do yawing rotation motion around the yawing rotation shaft 410, the yawing platform 440 drives the pitching platform 530 to do yawing rotation motion during yawing rotation motion, the pitching platform 530 drives the model mounting platform 610 to do yawing rotation motion and further drives the model 600 to do yawing rotation motion, the second driving device 550 drives the pitching platform 530 to do pitching motion, the pitching platform 530 drives the model mounting platform 610 to do pitching motion while doing pitching motion and further drives the model 600 to do pitching motion, the third driving device 620 drives the model mounting platform 610 to do axial motion, the model mounting platform 610 does axial motion and drives the model 600 to do axial motion, and three-degree-of-freedom (pitching, yawing and axial motion) motion can be well realized; when the attitude is fixed, the yaw platform 440, the pitch platform 530 and the model mounting platform 610 are respectively locked through the first locking device 450, the second locking device 560 and the third locking device 630 according to preset model positions (pitch angle, yaw angle and axial position), and then a test is carried out; the yawing platform 440, the pitching platform 530 and the model mounting platform 610 are respectively released through the first locking device 450, the second locking device 560 and the third locking device 630 when the attitude is changed, the motion parameters of the mechanism are set, the mechanism continuously moves according to the set parameters in the test, the axial direction is kept still, the pitching yawing rotation center is kept unchanged, namely the aircraft model can be centered around the yawing rotation shaft 410 and rotates around the yawing rotation shaft, and meanwhile, the aircraft model can perform centering motion around the specified rotation center no matter how the size of the mechanism, the position of the aircraft model, the mounting mode and the like are changed.

In conclusion, the high-speed wind tunnel three-degree-of-freedom model supporting mechanism can well realize three-degree-of-freedom (pitching, yawing and axial movement) movement, has two working modes of fixed attitude and variable attitude, is convenient to adjust and good in test stability, and can enable an aircraft model to do centering movement.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (5)

1. A high-speed wind tunnel three-degree-of-freedom model supporting mechanism is characterized by comprising a base, a supporting upright post, a yaw rotating shaft, a first driving device, a yaw guide rail group, a yaw platform, a first locking device, a front pitch guide rail mounting table, a rear pitch guide rail mounting table, a pitch platform, a pitch guide rail group, a second driving device, a second locking device, a model mounting platform, a third driving device and a third locking device, wherein the supporting upright post is connected with the base, one end face, far away from the base, of the supporting upright post comprises a first side edge and a second side edge which are arranged oppositely and a third side edge and a fourth side edge which are arranged oppositely, one end of the yaw rotating shaft is connected with the center of the first side edge, the other end of the yaw rotating shaft is connected with the yaw platform in a rotating manner, the yaw guide rail group is arranged on the second side edge, the third, the yawing platform is connected with the yawing guide rail group in a sliding manner, the yawing guide rail group comprises a first yawing guide rail, a second yawing guide rail and a third yawing guide rail, the number of the first yawing guide rails is two, the two first yawing guide rails are respectively and symmetrically arranged on the third side and the fourth side, the second yawing guide rail is arranged on the fourth side, the two third yawing guide rails are respectively and symmetrically arranged on the third side and the fourth side and are positioned between the first yawing guide rail and the second yawing guide rail, the first driving device is connected with the second side and is used for driving the yawing platform to do yawing rotary motion around a yawing rotary shaft, the first locking device is arranged on the second side and is used for locking or releasing the yawing platform, and the first locking device comprises a yawing locking hydraulic cylinder and a first bolt, driftage locking pneumatic cylinder install in the second side, driftage locking pneumatic cylinder with first bolt connection is used for driving first bolt is towards being close to or keeping away from the direction motion of driftage platform, the driftage platform be provided with a plurality ofly with first bolt matched with driftage platform locating hole, it is a plurality of the line at the center of driftage platform locating hole is first circular arc section, every adjacent two the center of driftage platform locating hole respectively with the contained angle that the line at the center of first circular arc section formed is 1, every single move guide rail group is all installed and all is provided with to the relative both sides face of every single move platform preceding every single move guide rail mount table with back every single move guide rail mount table, every single move guide rail group with the one end of preceding every single move guide rail mount table with the one end sliding connection of back every single move guide rail mount table, the other end of preceding every single move guide rail mount table with the other end of back every single move guide rail mount table all with The pitching guide rail group comprises a first pitching guide rail, a second pitching guide rail and a third pitching guide rail, the first pitching guide rail and the second pitching guide rail are both connected with the front pitching guide rail mounting table in a sliding manner, the third pitching guide rail is connected with the back pitching guide rail mounting table in a sliding manner, the second driving device is connected with the front pitching guide rail mounting table and used for driving the pitching platform to do pitching motion, the second locking device is installed on the back pitching guide rail mounting table and used for locking or releasing the pitching platform, the second locking device comprises a pitching locking hydraulic cylinder and a second bolt, the pitching locking hydraulic cylinder is installed on the back pitching guide rail mounting table, the pitching locking hydraulic cylinder is connected with the second bolt and used for driving the second bolt to move towards the direction close to or far away from the pitching platform, and the pitching platform is provided with a plurality of pitching platform positioning holes matched with the second bolt, the connecting line of the centers of the plurality of pitching platform positioning holes is a second arc section, the included angle formed by the centers of every two adjacent pitching platform positioning holes and the connecting line of the centers of the second arc sections is 1 degree, a linear guide rail is installed on one end face, far away from the yawing platform, of the pitching platform, one end of the model installation platform is connected with the model, the other end of the model installation platform is installed on the linear guide rail in a sliding mode, a groove is axially formed in one end face, far away from the yawing platform, of the pitching platform, a third driving device is installed on the groove and used for driving the model installation platform to axially move, a third locking device is installed on the pitching platform and used for locking or loosening the model installation platform, a first limiting block and a first limiting switch are installed on two sides of the second yawing guide rail, and a second limiting block and a second limiting switch are installed on the upper end of the second pitching guide rail and the lower end of, and third limiting blocks are arranged at two ends of the linear guide rail, a third limiting switch is arranged at one end of the linear guide rail, and a zero position switch is arranged at one end of the linear guide rail.

2. The high-speed wind tunnel three-degree-of-freedom model supporting mechanism is characterized in that the first driving device comprises a yaw hydraulic mounting seat, a yaw hydraulic cylinder and a hinge shaft, one end of the yaw hydraulic mounting seat is connected with the second side edge, the other end of the yaw hydraulic mounting seat is connected with the yaw hydraulic cylinder, one end of the hinge shaft is connected with a telescopic end of the yaw hydraulic cylinder, and the other end of the hinge shaft is connected with the yaw platform.

3. The high-speed wind tunnel three-degree-of-freedom model supporting mechanism is characterized in that the second driving device comprises two pitching hydraulic installation seats, two pitching hydraulic cylinders and two hydraulic cylinder hinged shafts, the two pitching hydraulic installation seats are respectively connected with the two front pitching guide rail installation tables, one ends, far away from the front pitching guide rail installation tables, of the two pitching hydraulic installation seats are connected with the pitching hydraulic cylinders, one ends of the hydraulic cylinder hinged shafts are connected with the telescopic ends of the pitching hydraulic cylinders, and the other ends of the hydraulic cylinder hinged shafts are connected with the pitching platform.

4. The high-speed wind tunnel three-degree-of-freedom model supporting mechanism is characterized in that the third driving device comprises an axial hydraulic cylinder mounting seat, an axial hydraulic cylinder and a connecting seat, one end of the axial hydraulic cylinder mounting seat is connected with the bottom wall of the groove, the other end of the axial hydraulic cylinder mounting seat is connected with the axial hydraulic cylinder, one end of the connecting seat is connected with the telescopic end of the axial hydraulic cylinder, and the other end of the connecting seat is connected with the model mounting platform.

5. The high-speed wind tunnel three-degree-of-freedom model supporting mechanism according to claim 1, wherein the third locking device comprises two locking mounting tables, two axial locking hydraulic cylinders and a third bolt, the two locking mounting tables are respectively mounted at one end, close to the model mounting platform, of each of the two side faces of the pitching platform, each of the locking mounting tables is provided with one axial locking hydraulic cylinder, each of the axial locking hydraulic cylinders is connected with the third bolt and used for driving the third bolt to move in a direction close to or away from the model mounting platform, and the two side faces of the model mounting platform are provided with a plurality of axial platform positioning holes matched with the third bolt at intervals.

Images